I really like this game.
It lacks a lot of the bells and whistles of other TD games but it makes up for it with strategy and concept. This is probably for experienced TD players. While it is certainly not a game that everyone will like, that is hardly a bad thing. The people who like this game will really like it.
I would love to see a sequel.
Beat the game with 2 trees.
The thing to do is to start with Fire or Ice and use Divine as a secondary tree.
Fire does more raw damage to the targets you hit but Ice has a much stronger AOE.
Divine lacks an AOE attack on par with the others and the other trees do not help it as a secondary tree much.